Chimney stop



.April 21, 192-5.

' .B..F. FOSS CHIMNEY, STOP Filed June 7. 1924 i I l 4 y 1 I 3 ll llhl e w 2 129.1

Inventor:

s y om'in E Foss.

5r t w. 61m

UNITED STATES PATENT OFFICE.

BENJAMIN 1E. FOSS, OF PORTLAND, MAINE.

CHIMNEY STOP.

Application filed. June 7,

To all whom it may concern:

Be it known that I, BENJAMLN F. Foss, a citizen of the United States, residing at Portland, in the county of Cumberland and 5 State of Maine, have invented certain new and useful Improvements in Chimney Stops, of which the following is a specification.

My invention relates to safety devices to be used in building s and it relates more particularly to means for filling. the vertical passage between timbers which the chimney and the floor are often found when the chimney passes vertically through the floor forming a natural draft through which the air passes when a nre in a house started.

In most clties it 1s specified that floor tunbers shall not rest must be separated against the chimney but from the chimney by a space which is often 1 inch or more from the chimney.

There is therefore,

frequently formed around the chimney a vertical space which may be in width 1 forms a natural upward draft house catches fire combustion of the inch or mor and which when the and adds greatly in the material of the house.

My invention has for its object the closing of this natural draft passageby means which are readily put in place and readily fitted to any width of passage.

The invention consists of a sheet of ma terial such as galvanized iron or the like which is folded back and forth to form a stop a little wider space and being than suflicient to fill the readily compressed into said space by compressing the several folds of the sheet against each other.

There is thus formed a stop completely filling the air space and preventing the air from ascending through such a space to fan the flames when such are started.

In addition to a fire stop my device may also be useful for closing up a space which may be utilized by finding their way the partitions.

rats and oth'ervermin in around the house within This space between the floor timbers and the chimney 1s sometimes filled with cement and sometimes wit h asbestos but almost all 1924. Serial No. 718,667.

houses after being built for a while have a tendency to shrink as to the woodwork and when this happens, cracks are oftenpro duced in the chimney and between the chimney and the floor. The chimney isalso quite liable to settle so that in case cement is used or any rigid construction a crack is liable to be formed.

I have illustrated my invention by means of the accompanying drawing in which Fig. l, is a vertical section through the floor timbers adjacent to the chimney, and

Fig. 2, is a perspective view of my fire stop in position to be placed next to the chimney and forced into the space which it is designed to occupy.

Referring to the drawing 1 represents floor timbers of the house and 2 is a chimney shown in elevation. Between the chimney and the floor timber is inserted my fire stop which consists bof a sheet of metal which in one direction is the same width as the chimney and in the opposite direction is folded over in the form of accordion plaits, here shown as three in number, so that they will substantially fill the space between the chimney and the fioor beam.

A portion 41- and a portion 5 are left fold. The portion 5 extending over the top of the floor timbers and the portion t fold-- ing backward and covering the several folds 6 into which the sheet is divided.

The sheet 3 spoken of is folded up to form a thickness somewhat more than the distance from the floor beam to the face of the chimney.

The corrugations or folds 6 are formed in a series of V-shaped folds so that they can readily be forced down between the floor timber and the chimney with the portion at folded over to stop any flair. passing up through the space.

It will be seen that when my stop is put down between the floor timbers and the chimney a thing which can be easily done by the foot, it will remain in place stopping the opening regardless of the position of the floor timbers or the chimney sliding vertic- -the folds of metal.

ally along thesurface of 'the Chimney when the frame Work ofthe house shrinks.

'After the fire stop 1s in place asbestos or any sult-able cement may be lnsertecl between I claim 7 v A fire stop for the spaces around a chin1- ney and the like, which consists of a sheet of non-inflammable material folded to form a series of horizontal corrugations to fit into said space and having at its top a portion which bends over and covers said corrugations.

BENJAMIN F. FOSS. 

